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Sound and Light
Vocabulary
| Question | Answer |
|---|---|
| A longitudinal wave that can travel only through matter. | Sound wave |
| The perception of how high or low a sound is; related to the frequency of a sound wave. | Pitch |
| A reflected sound wave. | Echo |
| Something that emits light. | Light source |
| Represents a narrow beam of light that travels in a straight line. | Light ray |
| A material that allows almost all of the light striking it to pass through, and through which objects can be seen clearly. | Transparent |
| A material through which light does not pass. | Opaque |
| Any reflecting surface that forms an image by regular reflection. | Mirror |
| A transparent object with at least one curved side that causes light to change direction. | Lens |
| A convex lens made of transparent tissue located on the outside of the eye. | Cornea |
| The colored part of the eye. | Iris |
| An opening into the interior of the eye at the center of the iris. | Pupil |
| A layer of special light-sensitive cells in the back of the eye. | Retina |
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